chapter 16
chapter 16
chapter 16
chapter 15
chapter 15
100
a naturally occurring, usually inorganic solid that has a characteristic chemical composition orderly internal structure
What is mineral
100
placer deposit
surface deposits where minerals are concentrated by wind and water
100
room-and-pillar mining
which of the following methods is not a subsurface mining method
100
seeds are planted among the roots of the previous crop
When a farmer uses no till farming methods
100
meat
more energy, water, and land are needed to produce a gram of than to produce a gram of food from plants
200
subsurface mining
What is the method is used if ore deposit is found 50m or more beneath earths surface
200
metal-conduct electricity, nonmetal-tend to be good insulations
What is explain the difference between a metal and a nonmetal
200
solution mining, solar evaporation
which of the following mining methods would most likely be used to mine salt
200
aquaculture
one potential way to deal with the problem of seafood overharvesting is by intensifying efforts
200
yield
the amount of a crop produced per hectare (or acre) is called the
300
surface mining
What is used when ore deposits are located close to earth surface
300
native elements
gold, silver, and copper are
300
heavy minerals
dredging would not be used to mine
300
using rainwater instead of groundwater on crops
Which of the following is a good way to reduce salinization
300
continues to be debated among scientists
genetic engineering of food crops
400
smelting
crushed ore is melted at high temperatures in a furnace
400
the cooling of magma, the circulation of hot water solutions in rocks, the evaporation of water that contains salts.
ore deposits form from
400
sulfur
which of the following elements in minerals causes soil to become acidified
400
irrigation
refers to water that is used for crops
400
become resistant to pesticides via natural selection
pest populations that damaged plants
500
subsidence
the sinking of regions of the ground with little or no horizontal movement
500
zinc
which of the following economically important elements is not a metal
500
the surface mining control and reclamation act of 1977
which of the following pieces of federal legislation established a program for regulating coal mining on public and private lands?
500
fertile
soil that can support the growth of healthy plants is called
500
become concentrated in organisms high on the food chain
persistent pesticides are those that
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